Apparatus using two-mode optical waveguide with non-...

Details Apparatus using two-mode optical waveguide with non-... Apparatus using two-mode optical waveguide with non-...

G - Physics

02

B

88/97.2

G02B 6/02 (2006.01)

Patent

CA 1292089

APPARATUS USING TWO-MODE OPTICAL WAVEGUIDE WITH NON-CIRCULAR CORE An apparatus utilizes a two-mode optical waveguide with a non-circular core to provide stable spatial intensity patterns in both propagation modes for light propagating therein. The light has a wavelength, and the non-circular core has cross-sectional dimensions selected such that (1) the waveguide propagates light at that wavelength in a fundamental mode and a higher order mode, and (2) substantially all of the light in the higher order mode propagates in only a single, stable intensity pattern. Embodiments of the invention include, for example, modal couplers, frequency shifters, mode selectors, and interferometers. One of the interferometer embodiments may be used as a strain gauge. UA3-996:ns/cc3 021987

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